Affiliate Marketing Secrets

I’m seriously thinking about setting up a website with Amazon affiliate programs on it. But some people are saying it’s not that easy and in most cases impossible to earn money by doing this. I wonder if someone here has practical experience of earning money thru Amazon affiliate programs. Thanks. 🙂

I’m setting up a website about travel and tourist destinations in North and South Carolina. I hope to make money when people click my affiliate links.
However …
I wonder if affiliate sites do better with a narrower focus like motorcycle roads in North Carolina, or things to do at the beach in South Carolina?

ok, lately ive ben thinking about setting up a website and add adsense on it. i know i have to have a niche, but its like all the things that i love are very competitive. i love, anything that has to do with the brain, like mental diseases anpsychologygy, i love talking about finding money for college (grants and scholarships). all these according to google keywords traffic are very competitive niches. what should i do. should i go for the competitive once that i love or choose somethingng i would like to know more about instead?